This comes up as a Trogen in Trend Micro
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Sudoku: Trend Micro
October 2, 2010 - 4:42am
#1
Sudoku: Trend Micro
October 2, 2010 - 6:02am
#2
FP
See: https://portableapps.com/support#false_positive
VT for installer: http://www.virustotal.com/file-scan/report.html?id=53b16e9769bdf36166246...
VT for soduku.exe (because there was a detection...) http://www.virustotal.com/file-scan/report.html?id=ad321dd6c21e8b764aab5...
I would suggest that you report the file as being a false positive.